5Purpose: Thise purpose of this study was to examineexamined the effect of different menu labelling 6 formats on healthy food choices in a real restaurant setting. Design/methodology/approach: This 7 cross-sectional, randomised and controlled parallel-group trial was conducted in Brazil in 2013. 313 8 university students were randomly assigned to one of three parallel groups with different menu 9 labelling formats. Of these, data from 233 students were analysed. The others did not attend and were 10 excluded. Intervention group 1 (n=88) received information in the form of a traffic light system plus 11 guideline daily amounts, while intervention group 2 (n=74) was presented with an ingredients list plus 12 highlighted symbols. The control group (n=71) received a menu with no menu labelling. Data were 13 collected on one weekday in a restaurant setting. Trial outcomes were assessed by healthy food 14 choices. Findings: Healthy food choices were significantly higher amongof students who received the 15 menu showing an ingredients list plus highlighted symbols were significantly higher when compared to 16 the other groups. Thise same menu labelling format positively affected healthy food choices in women, 17 not overweight participants and in participants who often ate out more than twice a week. 18 Originality/value: MA menu labelling format presentingthat presented an ingredients list and 19 highlighted symbols was positively associated with healthy food choices among university students in 20Brazil. This type of labelling could be adopted in future legislation on menu labelling in Brazil and 21 around the world. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 The term menu labelling can be used in different contexts, as a synonym for calorie information 37 (Roberto et al., 2013; Brochu and Dovidio, 2014;), for nutritional information (Yoon and George, 38 2012;Auchincloss et al., 2013), for the coloured traffic light system (Gerlach, 2013; Morley et al., 39 2013), or for food and nutritional information (Thunstrom and Nordstrom, 2011; Feldman et al., 2013). 40For the purposes of the present study, menu labelling refers to all calorie information, nutritional 41 information (such as calories and nutrients), and food information (e.g. ingredients list, highlighted 42 symbols to designate 'vegetarian' and phrases like 'contains gluten'), as well as the traffic light system 43 plus guideline daily amounts. 44Menu labelling is a public health strategy that is debated around the world as a way to help prevent 45 obesity and other chronic diseases by informing consumers' choices (Bleich and Pollack, 2010; Malik 46 et al., 2013). However, only in the United States of America (USA) is it mandatory under federal law; 47 there, restaurants and similar food service establishments that are part of a chain of 20 or more must 48 prov...